Improved brick-machine



@met @tira HENRY H. GRAY, OF HAVERSTRAV N YORK, ASSIGNOR 'FO-HIM- SELFAND MOSES B. PARDEE, OF'NORWALK, CONNECTICUT,

Lette/rs Patent No. 84,624, ,dated December '1, 1868.

mueven BRICK-mem.-

lb-all 'whom it ma/y conce/m: v

Be a known that I, HENRY H. GRAY, 0f never;

straw, ,in the county of Rockland, and State of, New York, have inventeda new and improved Brick-Machine; and I do h ereby declare,the followingto be' a full, clear, and exact description thereof, which4 willv enablethose skilled in the art to make and use the same, reference being hadto the accompanying drawing, forming part of this specification, inwhich drawingmovable stops with stair-shaped edges, in combination withthe cross-bar, which imparts motion to the plunger of the press-box insuch a manner that, by adjusting said stops, the throw of the plungercan-Abechanged, and that a positive unyielding motion is imparted tosaid plunger in whatever position the adjustable stops 'may be brought.

VIt consists further in the arrangement of a yieldingl latch, incombination with the connecting-rod or pit man which imparts motion tothe pusher-bar of the mould, in-such a manner that,'if one of the mouldsmeets with an unyielding obstruction, the pitman will b e disengagedautomatically, and injury to the work'- ing-parts of the machine isavoided.

VA represents abox, made of wood or any other suitable material,through/ the centre of which rises the shaft B, which has its bearing ontop in the bridge C, and which passesdown through the bottom of the boxA, and has its bearing below in a step, a, secured to the frame-workwhich supports the box A.

Secured to the shaft B, and situated close to the bottom of the box A,.is the pug-wheel D, which serves to temper the clay, and toforce it outinto the pressbox E, which. communicates with the box A by means of anopening, b, as shown in figs; 1 and 2.

To the ends of the arms of the'pug-wheel D are se cured the broad-wingsc, andthespeed of said pug-A wheel is so adjusted that said wings formabutments on the inside of the opening b, and ,prevent the clay frombeing forced back from the press-box E when the plunger F descends.v

By the action of this plunger the clay is forced through thegrate-shaped bottom of the pressbox into the moulds, which are supportedby thel roller-platform G.

From the upper surface of the plunger extend two bifurcated standards,d, which straddle the cross-bar e, to which a rising and falling motionis imparted by means of arms j, which extend om the rock-shaft g, thatreceives an oscillating motion from the eccentricdisk h on the uprightshaft fi..

Figure 1 represents a longitudinal'vertical section I From thisdescription it will be understood that the .stroke of the cross-bar e isuniform, but said cross-bar has a dead motionin the forked standards d,theamount of which can be regulated by stair-shaped -stops j.'

These stops are hinged to the inner edges ofthe standards d, and theyare connected by a rod, k, which sweeps over a perforated arc, l. Byinserting a pin behind the rod 7c into the arc Z,- the stair-shapedstops are retained in a certain position, and, as the cross-bar e,descends, it strikes said stops, and the plunger is forced down. Bychanging the position of the stops j, therefore, the stroke oftheplunger can be adjusted as circumstances may make desirable.

The front plate m, of 'the press-box, is provided with toothed racks, n,which `gear in pinions o mounted on a shaft, p, sothat, by turnin g saidshaft, the front plate can be raised and lowered with ease andconvenience,

and access can be had to the interior of the press-box. v

The moulds are introduced through an aperture, g, in the side of theframe-work supporting the box A, and they are successively pushed underthe press-box by the action of a bar, r, which is secured iutwo arms, s,extending froma rock-shaft, t. This rock-shaftis turned back by theaction of a spring, u, and itis turned forward by a cam, c, on the shaftt, which acts, at theproper intervals, on a shoulder of the rod w, whichconnects, by an arm, a', withthe rock-shaft t.

The connection between the rod 'w and the arm a is effected by ayielding latch, (see iig. 1,) which is so arranged thatwhen the pressureagainst it exceeds a certain limit, it yields, and releases the rod w.The

object of this arrangement is to prevent injury tothe mechanism if oneof the moulds meets with an undue resistance.

The throw of the pusher-bar r is adjusted by shifting the boxes c',which form the bearings for the rock- 'shaft t. These boxes are providedwith slots, (see tig. 3,) so that they can be moved towards and om theAshaftfi. When they are brought closer to said shaft, the pusher-bardrives the moulds further out, and, m'cc tersa, and thereby the operatoris enabled to adjust the mechanism so that' each mould is broughtexactly under the press-box.

The shaft i receives its motion om the shaft B of the pugfwheel, and theentire gearing is placed below the box A, so that the operator has freeaccess to the same, and that it is not liable to become choked by theclay. Having thus describedmy invention,

What 1 claim as new, and'desire to secure by Let ters Patent, is-

1. .The stair-shaped stops j, in combination with.

standard Z, cross-bar e, and plunger F, substantially as and for thepurpose set forth.

2. The yielding latch b', in combination with the pusher-bar fr,substantially as and for the purpose described,

This speciiication signed by me, this 6th day of October, A; D. 1868.

HENRY H. GRAY.

Witnesses:

W. HAU/1in, Eauns'r F. Kasrnmnnnn.

